FAB PISTON CUP 2 3/8 OD X 1/2 X 1/8

K237 is a Buna-N (Nitrile) U-Cup U-Cup Seal supplied with a 1/2 inch inside diameter, a 2-3/8 inch outside diameter, and a height of 1/8 inch. In service, this u-cup seal uses a U-shaped profile that system pressure forces outward, tightening the seal as pressure rises.

The compound resists many alcohols, hydraulic fluids, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service.

Common environments for this compound include automotive, hydraulic and pneumatic systems, and fluid power.

K237 ships individually. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.